2018-08-06 19:31:09 +00:00
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/*
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* "git rebase" builtin command
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*
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* Copyright (c) 2018 Pratik Karki
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*/
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#include "builtin.h"
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#include "run-command.h"
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#include "exec-cmd.h"
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#include "argv-array.h"
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#include "dir.h"
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2018-08-06 19:31:11 +00:00
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#include "packfile.h"
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#include "refs.h"
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#include "quote.h"
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#include "config.h"
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#include "cache-tree.h"
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#include "unpack-trees.h"
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#include "lockfile.h"
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2018-09-04 21:27:07 +00:00
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#include "parse-options.h"
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2018-09-04 21:27:09 +00:00
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#include "commit.h"
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2018-09-04 21:27:13 +00:00
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#include "diff.h"
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2018-09-04 21:27:14 +00:00
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#include "wt-status.h"
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2018-09-04 21:27:07 +00:00
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static char const * const builtin_rebase_usage[] = {
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N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
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"[<upstream>] [<branch>]"),
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N_("git rebase [-i] [options] [--exec <cmd>] [--onto <newbase>] "
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"--root [<branch>]"),
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N_("git rebase --continue | --abort | --skip | --edit-todo"),
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NULL
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};
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2018-08-06 19:31:11 +00:00
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static GIT_PATH_FUNC(apply_dir, "rebase-apply")
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static GIT_PATH_FUNC(merge_dir, "rebase-merge")
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enum rebase_type {
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REBASE_UNSPECIFIED = -1,
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REBASE_AM,
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REBASE_MERGE,
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REBASE_INTERACTIVE,
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REBASE_PRESERVE_MERGES
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};
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2018-08-06 19:31:09 +00:00
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static int use_builtin_rebase(void)
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{
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struct child_process cp = CHILD_PROCESS_INIT;
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struct strbuf out = STRBUF_INIT;
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int ret;
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argv_array_pushl(&cp.args,
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"config", "--bool", "rebase.usebuiltin", NULL);
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cp.git_cmd = 1;
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if (capture_command(&cp, &out, 6)) {
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strbuf_release(&out);
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return 0;
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}
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strbuf_trim(&out);
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ret = !strcmp("true", out.buf);
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strbuf_release(&out);
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return ret;
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}
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2018-08-06 19:31:11 +00:00
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static int apply_autostash(void)
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{
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warning("TODO");
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return 0;
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}
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struct rebase_options {
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enum rebase_type type;
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const char *state_dir;
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struct commit *upstream;
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const char *upstream_name;
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2018-09-04 21:27:10 +00:00
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const char *upstream_arg;
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2018-08-06 19:31:11 +00:00
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char *head_name;
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struct object_id orig_head;
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struct commit *onto;
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const char *onto_name;
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const char *revisions;
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int root;
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struct commit *restrict_revision;
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int dont_finish_rebase;
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2018-09-04 21:27:12 +00:00
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enum {
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REBASE_NO_QUIET = 1<<0,
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2018-09-04 21:27:13 +00:00
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REBASE_VERBOSE = 1<<1,
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REBASE_DIFFSTAT = 1<<2,
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2018-09-04 21:27:12 +00:00
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} flags;
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struct strbuf git_am_opt;
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2018-08-06 19:31:11 +00:00
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};
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/* Returns the filename prefixed by the state_dir */
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static const char *state_dir_path(const char *filename, struct rebase_options *opts)
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{
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static struct strbuf path = STRBUF_INIT;
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static size_t prefix_len;
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if (!prefix_len) {
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strbuf_addf(&path, "%s/", opts->state_dir);
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prefix_len = path.len;
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}
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strbuf_setlen(&path, prefix_len);
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strbuf_addstr(&path, filename);
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return path.buf;
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}
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static int finish_rebase(struct rebase_options *opts)
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{
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struct strbuf dir = STRBUF_INIT;
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const char *argv_gc_auto[] = { "gc", "--auto", NULL };
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delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
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apply_autostash();
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close_all_packs(the_repository->objects);
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/*
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* We ignore errors in 'gc --auto', since the
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* user should see them.
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*/
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run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
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strbuf_addstr(&dir, opts->state_dir);
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remove_dir_recursively(&dir, 0);
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strbuf_release(&dir);
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return 0;
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}
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static struct commit *peel_committish(const char *name)
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{
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struct object *obj;
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struct object_id oid;
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if (get_oid(name, &oid))
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return NULL;
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obj = parse_object(the_repository, &oid);
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return (struct commit *)peel_to_type(name, 0, obj, OBJ_COMMIT);
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}
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static void add_var(struct strbuf *buf, const char *name, const char *value)
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{
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if (!value)
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strbuf_addf(buf, "unset %s; ", name);
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else {
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strbuf_addf(buf, "%s=", name);
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sq_quote_buf(buf, value);
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strbuf_addstr(buf, "; ");
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}
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}
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static int run_specific_rebase(struct rebase_options *opts)
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{
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const char *argv[] = { NULL, NULL };
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struct strbuf script_snippet = STRBUF_INIT;
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int status;
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const char *backend, *backend_func;
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add_var(&script_snippet, "GIT_DIR", absolute_path(get_git_dir()));
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add_var(&script_snippet, "state_dir", opts->state_dir);
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add_var(&script_snippet, "upstream_name", opts->upstream_name);
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add_var(&script_snippet, "upstream",
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oid_to_hex(&opts->upstream->object.oid));
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add_var(&script_snippet, "head_name", opts->head_name);
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add_var(&script_snippet, "orig_head", oid_to_hex(&opts->orig_head));
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add_var(&script_snippet, "onto", oid_to_hex(&opts->onto->object.oid));
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add_var(&script_snippet, "onto_name", opts->onto_name);
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add_var(&script_snippet, "revisions", opts->revisions);
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add_var(&script_snippet, "restrict_revision", opts->restrict_revision ?
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oid_to_hex(&opts->restrict_revision->object.oid) : NULL);
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2018-09-04 21:27:12 +00:00
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add_var(&script_snippet, "GIT_QUIET",
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opts->flags & REBASE_NO_QUIET ? "" : "t");
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add_var(&script_snippet, "git_am_opt", opts->git_am_opt.buf);
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2018-09-04 21:27:13 +00:00
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add_var(&script_snippet, "verbose",
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opts->flags & REBASE_VERBOSE ? "t" : "");
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add_var(&script_snippet, "diffstat",
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opts->flags & REBASE_DIFFSTAT ? "t" : "");
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2018-08-06 19:31:11 +00:00
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switch (opts->type) {
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case REBASE_AM:
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backend = "git-rebase--am";
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backend_func = "git_rebase__am";
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break;
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case REBASE_INTERACTIVE:
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backend = "git-rebase--interactive";
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backend_func = "git_rebase__interactive";
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break;
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case REBASE_MERGE:
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backend = "git-rebase--merge";
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backend_func = "git_rebase__merge";
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break;
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case REBASE_PRESERVE_MERGES:
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backend = "git-rebase--preserve-merges";
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backend_func = "git_rebase__preserve_merges";
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break;
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default:
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BUG("Unhandled rebase type %d", opts->type);
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break;
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}
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strbuf_addf(&script_snippet,
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". git-sh-setup && . git-rebase--common &&"
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" . %s && %s", backend, backend_func);
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argv[0] = script_snippet.buf;
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status = run_command_v_opt(argv, RUN_USING_SHELL);
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if (opts->dont_finish_rebase)
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; /* do nothing */
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else if (status == 0) {
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if (!file_exists(state_dir_path("stopped-sha", opts)))
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finish_rebase(opts);
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} else if (status == 2) {
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struct strbuf dir = STRBUF_INIT;
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apply_autostash();
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strbuf_addstr(&dir, opts->state_dir);
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remove_dir_recursively(&dir, 0);
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strbuf_release(&dir);
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die("Nothing to do");
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}
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strbuf_release(&script_snippet);
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return status ? -1 : 0;
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}
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#define GIT_REFLOG_ACTION_ENVIRONMENT "GIT_REFLOG_ACTION"
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static int reset_head(struct object_id *oid, const char *action,
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const char *switch_to_branch, int detach_head)
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{
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struct object_id head_oid;
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struct tree_desc desc;
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struct lock_file lock = LOCK_INIT;
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struct unpack_trees_options unpack_tree_opts;
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struct tree *tree;
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const char *reflog_action;
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struct strbuf msg = STRBUF_INIT;
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size_t prefix_len;
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struct object_id *orig = NULL, oid_orig,
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*old_orig = NULL, oid_old_orig;
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int ret = 0;
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if (hold_locked_index(&lock, LOCK_REPORT_ON_ERROR) < 0)
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return -1;
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if (!oid) {
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if (get_oid("HEAD", &head_oid)) {
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rollback_lock_file(&lock);
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return error(_("could not determine HEAD revision"));
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}
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oid = &head_oid;
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}
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memset(&unpack_tree_opts, 0, sizeof(unpack_tree_opts));
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setup_unpack_trees_porcelain(&unpack_tree_opts, action);
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unpack_tree_opts.head_idx = 1;
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unpack_tree_opts.src_index = the_repository->index;
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unpack_tree_opts.dst_index = the_repository->index;
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unpack_tree_opts.fn = oneway_merge;
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unpack_tree_opts.update = 1;
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unpack_tree_opts.merge = 1;
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if (!detach_head)
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unpack_tree_opts.reset = 1;
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if (read_index_unmerged(the_repository->index) < 0) {
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rollback_lock_file(&lock);
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return error(_("could not read index"));
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}
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if (!fill_tree_descriptor(&desc, oid)) {
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error(_("failed to find tree of %s"), oid_to_hex(oid));
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rollback_lock_file(&lock);
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free((void *)desc.buffer);
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return -1;
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}
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if (unpack_trees(1, &desc, &unpack_tree_opts)) {
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rollback_lock_file(&lock);
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free((void *)desc.buffer);
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return -1;
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}
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tree = parse_tree_indirect(oid);
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prime_cache_tree(the_repository->index, tree);
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if (write_locked_index(the_repository->index, &lock, COMMIT_LOCK) < 0)
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ret = error(_("could not write index"));
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free((void *)desc.buffer);
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if (ret)
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return ret;
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reflog_action = getenv(GIT_REFLOG_ACTION_ENVIRONMENT);
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strbuf_addf(&msg, "%s: ", reflog_action ? reflog_action : "rebase");
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prefix_len = msg.len;
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if (!get_oid("ORIG_HEAD", &oid_old_orig))
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old_orig = &oid_old_orig;
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if (!get_oid("HEAD", &oid_orig)) {
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orig = &oid_orig;
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strbuf_addstr(&msg, "updating ORIG_HEAD");
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update_ref(msg.buf, "ORIG_HEAD", orig, old_orig, 0,
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UPDATE_REFS_MSG_ON_ERR);
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} else if (old_orig)
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delete_ref(NULL, "ORIG_HEAD", old_orig, 0);
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strbuf_setlen(&msg, prefix_len);
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strbuf_addstr(&msg, "updating HEAD");
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if (!switch_to_branch)
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ret = update_ref(msg.buf, "HEAD", oid, orig, REF_NO_DEREF,
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UPDATE_REFS_MSG_ON_ERR);
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else {
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ret = create_symref("HEAD", switch_to_branch, msg.buf);
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if (!ret)
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ret = update_ref(msg.buf, "HEAD", oid, NULL, 0,
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UPDATE_REFS_MSG_ON_ERR);
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}
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strbuf_release(&msg);
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return ret;
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}
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2018-09-04 21:27:13 +00:00
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static int rebase_config(const char *var, const char *value, void *data)
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{
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struct rebase_options *opts = data;
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if (!strcmp(var, "rebase.stat")) {
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if (git_config_bool(var, value))
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opts->flags |= REBASE_DIFFSTAT;
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else
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opts->flags &= !REBASE_DIFFSTAT;
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return 0;
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}
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return git_default_config(var, value, data);
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}
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2018-08-06 19:31:09 +00:00
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int cmd_rebase(int argc, const char **argv, const char *prefix)
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{
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2018-08-06 19:31:11 +00:00
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struct rebase_options options = {
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.type = REBASE_UNSPECIFIED,
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2018-09-04 21:27:12 +00:00
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.flags = REBASE_NO_QUIET,
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.git_am_opt = STRBUF_INIT,
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2018-08-06 19:31:11 +00:00
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};
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const char *branch_name;
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int ret, flags;
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2018-09-04 21:27:10 +00:00
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int ok_to_skip_pre_rebase = 0;
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2018-08-06 19:31:11 +00:00
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struct strbuf msg = STRBUF_INIT;
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struct strbuf revisions = STRBUF_INIT;
|
2018-09-04 21:27:09 +00:00
|
|
|
struct object_id merge_base;
|
2018-09-04 21:27:07 +00:00
|
|
|
struct option builtin_rebase_options[] = {
|
|
|
|
OPT_STRING(0, "onto", &options.onto_name,
|
|
|
|
N_("revision"),
|
|
|
|
N_("rebase onto given branch instead of upstream")),
|
2018-09-04 21:27:10 +00:00
|
|
|
OPT_BOOL(0, "no-verify", &ok_to_skip_pre_rebase,
|
|
|
|
N_("allow pre-rebase hook to run")),
|
2018-09-04 21:27:12 +00:00
|
|
|
OPT_NEGBIT('q', "quiet", &options.flags,
|
|
|
|
N_("be quiet. implies --no-stat"),
|
2018-09-04 21:27:13 +00:00
|
|
|
REBASE_NO_QUIET| REBASE_VERBOSE | REBASE_DIFFSTAT),
|
|
|
|
OPT_BIT('v', "verbose", &options.flags,
|
|
|
|
N_("display a diffstat of what changed upstream"),
|
|
|
|
REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT),
|
|
|
|
{OPTION_NEGBIT, 'n', "no-stat", &options.flags, NULL,
|
|
|
|
N_("do not show diffstat of what changed upstream"),
|
|
|
|
PARSE_OPT_NOARG, NULL, REBASE_DIFFSTAT },
|
2018-09-04 21:27:07 +00:00
|
|
|
OPT_END(),
|
|
|
|
};
|
2018-08-06 19:31:11 +00:00
|
|
|
|
2018-08-06 19:31:09 +00:00
|
|
|
/*
|
|
|
|
* NEEDSWORK: Once the builtin rebase has been tested enough
|
|
|
|
* and git-legacy-rebase.sh is retired to contrib/, this preamble
|
|
|
|
* can be removed.
|
|
|
|
*/
|
|
|
|
|
|
|
|
if (!use_builtin_rebase()) {
|
|
|
|
const char *path = mkpath("%s/git-legacy-rebase",
|
|
|
|
git_exec_path());
|
|
|
|
|
|
|
|
if (sane_execvp(path, (char **)argv) < 0)
|
|
|
|
die_errno(_("could not exec %s"), path);
|
|
|
|
else
|
|
|
|
BUG("sane_execvp() returned???");
|
|
|
|
}
|
|
|
|
|
2018-09-04 21:27:07 +00:00
|
|
|
if (argc == 2 && !strcmp(argv[1], "-h"))
|
|
|
|
usage_with_options(builtin_rebase_usage,
|
|
|
|
builtin_rebase_options);
|
|
|
|
|
2018-08-06 19:31:09 +00:00
|
|
|
prefix = setup_git_directory();
|
|
|
|
trace_repo_setup(prefix);
|
|
|
|
setup_work_tree();
|
|
|
|
|
2018-09-04 21:27:13 +00:00
|
|
|
git_config(rebase_config, &options);
|
|
|
|
|
2018-09-04 21:27:07 +00:00
|
|
|
argc = parse_options(argc, argv, prefix,
|
|
|
|
builtin_rebase_options,
|
|
|
|
builtin_rebase_usage, 0);
|
|
|
|
|
|
|
|
if (argc > 2)
|
|
|
|
usage_with_options(builtin_rebase_usage,
|
|
|
|
builtin_rebase_options);
|
2018-08-06 19:31:11 +00:00
|
|
|
|
2018-09-04 21:27:12 +00:00
|
|
|
if (!(options.flags & REBASE_NO_QUIET))
|
|
|
|
strbuf_addstr(&options.git_am_opt, " -q");
|
|
|
|
|
2018-08-06 19:31:11 +00:00
|
|
|
switch (options.type) {
|
|
|
|
case REBASE_MERGE:
|
|
|
|
case REBASE_INTERACTIVE:
|
|
|
|
case REBASE_PRESERVE_MERGES:
|
|
|
|
options.state_dir = merge_dir();
|
|
|
|
break;
|
|
|
|
case REBASE_AM:
|
|
|
|
options.state_dir = apply_dir();
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
/* the default rebase backend is `--am` */
|
|
|
|
options.type = REBASE_AM;
|
|
|
|
options.state_dir = apply_dir();
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!options.root) {
|
2018-09-04 21:27:07 +00:00
|
|
|
if (argc < 1)
|
2018-08-06 19:31:11 +00:00
|
|
|
die("TODO: handle @{upstream}");
|
|
|
|
else {
|
2018-09-04 21:27:07 +00:00
|
|
|
options.upstream_name = argv[0];
|
2018-08-06 19:31:11 +00:00
|
|
|
argc--;
|
|
|
|
argv++;
|
|
|
|
if (!strcmp(options.upstream_name, "-"))
|
|
|
|
options.upstream_name = "@{-1}";
|
|
|
|
}
|
|
|
|
options.upstream = peel_committish(options.upstream_name);
|
|
|
|
if (!options.upstream)
|
|
|
|
die(_("invalid upstream '%s'"), options.upstream_name);
|
2018-09-04 21:27:10 +00:00
|
|
|
options.upstream_arg = options.upstream_name;
|
2018-08-06 19:31:11 +00:00
|
|
|
} else
|
|
|
|
die("TODO: upstream for --root");
|
|
|
|
|
|
|
|
/* Make sure the branch to rebase onto is valid. */
|
|
|
|
if (!options.onto_name)
|
|
|
|
options.onto_name = options.upstream_name;
|
|
|
|
if (strstr(options.onto_name, "...")) {
|
2018-09-04 21:27:09 +00:00
|
|
|
if (get_oid_mb(options.onto_name, &merge_base) < 0)
|
|
|
|
die(_("'%s': need exactly one merge base"),
|
|
|
|
options.onto_name);
|
|
|
|
options.onto = lookup_commit_or_die(&merge_base,
|
|
|
|
options.onto_name);
|
2018-08-06 19:31:11 +00:00
|
|
|
} else {
|
|
|
|
options.onto = peel_committish(options.onto_name);
|
|
|
|
if (!options.onto)
|
|
|
|
die(_("Does not point to a valid commit '%s'"),
|
|
|
|
options.onto_name);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* If the branch to rebase is given, that is the branch we will rebase
|
|
|
|
* branch_name -- branch/commit being rebased, or
|
|
|
|
* HEAD (already detached)
|
|
|
|
* orig_head -- commit object name of tip of the branch before rebasing
|
|
|
|
* head_name -- refs/heads/<that-branch> or "detached HEAD"
|
|
|
|
*/
|
2018-09-04 21:27:07 +00:00
|
|
|
if (argc > 0)
|
2018-08-06 19:31:11 +00:00
|
|
|
die("TODO: handle switch_to");
|
|
|
|
else {
|
|
|
|
/* Do not need to switch branches, we are already on it. */
|
|
|
|
options.head_name =
|
|
|
|
xstrdup_or_null(resolve_ref_unsafe("HEAD", 0, NULL,
|
|
|
|
&flags));
|
|
|
|
if (!options.head_name)
|
|
|
|
die(_("No such ref: %s"), "HEAD");
|
|
|
|
if (flags & REF_ISSYMREF) {
|
|
|
|
if (!skip_prefix(options.head_name,
|
|
|
|
"refs/heads/", &branch_name))
|
|
|
|
branch_name = options.head_name;
|
|
|
|
|
|
|
|
} else {
|
|
|
|
options.head_name = xstrdup("detached HEAD");
|
|
|
|
branch_name = "HEAD";
|
|
|
|
}
|
|
|
|
if (get_oid("HEAD", &options.orig_head))
|
|
|
|
die(_("Could not resolve HEAD to a revision"));
|
|
|
|
}
|
|
|
|
|
2018-09-04 21:27:14 +00:00
|
|
|
if (read_index(the_repository->index) < 0)
|
|
|
|
die(_("could not read index"));
|
|
|
|
|
|
|
|
if (require_clean_work_tree("rebase",
|
|
|
|
_("Please commit or stash them."), 1, 1)) {
|
|
|
|
ret = 1;
|
|
|
|
goto cleanup;
|
|
|
|
}
|
|
|
|
|
2018-09-04 21:27:10 +00:00
|
|
|
/* If a hook exists, give it a chance to interrupt*/
|
|
|
|
if (!ok_to_skip_pre_rebase &&
|
|
|
|
run_hook_le(NULL, "pre-rebase", options.upstream_arg,
|
|
|
|
argc ? argv[0] : NULL, NULL))
|
|
|
|
die(_("The pre-rebase hook refused to rebase."));
|
|
|
|
|
2018-09-04 21:27:13 +00:00
|
|
|
if (options.flags & REBASE_DIFFSTAT) {
|
|
|
|
struct diff_options opts;
|
|
|
|
|
|
|
|
if (options.flags & REBASE_VERBOSE)
|
|
|
|
printf(_("Changes from %s to %s:\n"),
|
|
|
|
oid_to_hex(&merge_base),
|
|
|
|
oid_to_hex(&options.onto->object.oid));
|
|
|
|
|
|
|
|
/* We want color (if set), but no pager */
|
|
|
|
diff_setup(&opts);
|
|
|
|
opts.stat_width = -1; /* use full terminal width */
|
|
|
|
opts.stat_graph_width = -1; /* respect statGraphWidth config */
|
|
|
|
opts.output_format |=
|
|
|
|
DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;
|
|
|
|
opts.detect_rename = DIFF_DETECT_RENAME;
|
|
|
|
diff_setup_done(&opts);
|
|
|
|
diff_tree_oid(&merge_base, &options.onto->object.oid,
|
|
|
|
"", &opts);
|
|
|
|
diffcore_std(&opts);
|
|
|
|
diff_flush(&opts);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Detach HEAD and reset the tree */
|
|
|
|
if (options.flags & REBASE_NO_QUIET)
|
|
|
|
printf(_("First, rewinding head to replay your work on top of "
|
|
|
|
"it...\n"));
|
|
|
|
|
2018-08-06 19:31:11 +00:00
|
|
|
strbuf_addf(&msg, "rebase: checkout %s", options.onto_name);
|
|
|
|
if (reset_head(&options.onto->object.oid, "checkout", NULL, 1))
|
|
|
|
die(_("Could not detach HEAD"));
|
|
|
|
strbuf_release(&msg);
|
|
|
|
|
|
|
|
strbuf_addf(&revisions, "%s..%s",
|
|
|
|
options.root ? oid_to_hex(&options.onto->object.oid) :
|
|
|
|
(options.restrict_revision ?
|
|
|
|
oid_to_hex(&options.restrict_revision->object.oid) :
|
|
|
|
oid_to_hex(&options.upstream->object.oid)),
|
|
|
|
oid_to_hex(&options.orig_head));
|
|
|
|
|
|
|
|
options.revisions = revisions.buf;
|
|
|
|
|
|
|
|
ret = !!run_specific_rebase(&options);
|
|
|
|
|
2018-09-04 21:27:14 +00:00
|
|
|
cleanup:
|
2018-08-06 19:31:11 +00:00
|
|
|
strbuf_release(&revisions);
|
|
|
|
free(options.head_name);
|
|
|
|
return ret;
|
2018-08-06 19:31:09 +00:00
|
|
|
}
|